The belief that the world is getting worse, that we can't solve extreme poverty and disease, isn't just mistaken. It is harmful.

You need a certain standard of literacy, moral and ethical values, to be able to run a one man, one vote system.

Power is not a means, it is an end. One does not establish a dictatorship in order to safeguard a revolution; one makes the revolution in order to establish the dictatorship.

Continuous effort—not strength or intelligence—is the key to unlocking our potential.

The situation in the sciences is this: A concept or an idea which cannot be measured or cannot be referred directly to experiment may or may not be useful. It need not exist in a theory.